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W. A1 CALDWELL.

VENTIVLATEQGRAIN cms sTAvE. APPLCATON FILED MAILZI, 1921.

ReissnedNov. 1, 1921.

www @MMX U 1. JEU" QE l4f inforcing bars medially` of the WARREN A.CALDWELL, F OS'ALGOSA,

PATENT omer..

PANY, INC., 0F OSKALOOSA, IGWA, A CORPORATON' GF IOWA.'

VENTILADED GRAIN-CRIB STAVE.

15,217. iginni No. 1,298,174, mea

To all whom it concern:

Be it known that l, VVAnnnN A.. CALDWELL,

a citizen of the United States, residing at Oskaloosa, in the county ofMaheska and 5 State of Iowa, have invented new und useful Improvementsin `Ventilated Grain-Crib Staves, ot' which the following is zispecilication.

The invention relates to en improved rain-crib steve and has for itsprimary ob- ]ect to provide a structure having one or more Ventilatingopenings therein with a metal grating extending across the opening oropenings and constituting reinforcing means for the stave.

A further object4 of the invention is to provide a stave wherein thegrating is formed by reinforcing bers adapted not only to prevent wasteof any stored materia through theventilating openings of the stave butalso adapted to prevent the entrance of rodents through the saidopenings.

And the invention has es a still further object to provide a stave soconstructed that the ventilating openings maybe formed therein at thetime the stave is molded.

Other and incidental objects will appear' as the description proceeds.ln the drewings wherein l have illustrated the preferred embodiment ofthe invention, an wherein similar reference characters designatecorresponding parts thoughout the several views:

Figure 1 is a side elevation showing a. grain bin constructed of myimpro ved stoves.

Fig. 2 is a side elevation showing one of the staves of the structure indetail and particularly illustrating the Ventilating openings therein aswell es the disposition of the 40 reinforcing bars forthe steve to formgratin s at the openings.

ig. 3 is a transverse sectional view taken on the line 3--3 of Fig. 2,this view particularly showing the disposition of theresteve.

Referrl now more particularly to the drawings, have, in Fig. 1, shownain-ih constructed of my improved staves. A stave of the design shown'particularly in Fig. 2 is employed and in the construction of theSpeciceton of Reissued Letters Patent.

March 25, 191,9, Serial No. reissue filed March 21. 1921.

- posed course.

Rescued Nev. 1, 19121, l

233,518, le''lfay B, 1918. Application for seri-n no. 454,230. crib the.seid Steves ure arranged in courses huilt successively upon eech other.However, it should in this connection he observed that the outer endedges of the strives orming the top and Yhottoinv courses ol the structure are str-night so that the bottom course may rest let upon esuitable foundation while :i root of approved' character may be erectedupon the top course.

The strive of the present invention is, in its general form.y somewhatsimilar to an ordinary limi-rel stave in that its length issubstantially greater hun its breadth, and it is comparatively thin. ltdiffers suhsantinlly from the ordinary buildingy b ook which usually isof substantial thickness sind the length o'fwhich'is ordinarilyapproximately the same es its breadth. The stave is illustrated indeteilin Figs. 2 und 3. This 'steve is preferably oblong in outline andis formed ot concrete or other similar material. The longitudinal edgesot the stave are respectively concave and convex, as indicated et l0 andil, the concave edge of one stave being adapted to receive the convex.edge 'of an adjacent steve ,so that the longitudinal edgesl of ebutingSteves will interiit. 'At its ends the steve isreversely offset so thatthe ends of the strives oi, one course of :L structure erected thereiromwill, as shown in Fig. l, match with und overlap the abutting ends of`the staves of e super- Trensverse offset edge ortions l2 and 13respectively are thus de ned et one end of the stave. These edgeportions are approximately of equal length and are ioined medielly ofthe staves by e longitudinel portion or shoulder. 14. As shown v theseseveral portions'ere provided with a continuous medial. rib 1.15terminating 'in spjiced relation to the side faces otthestave to deneflat marginal end faces. At its opposite end the steve is .formed withtrans verse offset edge portions 17 andglS respec-v V tivelycorresponding the edge portions 12' and 1B et the other end of the steveand joined at their inner extremities by @me longitudinal edge' portionor shoulder 19 coarresponding to the edge portions 17, 18

the-shoulder 14. Formed mv :1.116,19` isn conw in their ends embedded inthe material of said stave, said hars const'tuting reinforcin means orseid stave and a. grating for said opening. i

7. A stave for grain rib construction having an elongated comparativelythin and narrow body provided with a. vontlalinv opening extendingtransversely therethrough from one side face to the having gratingmembers said opening an resist without rupture the of grain and torevent ent REN A.

other, said stave extending across '10 of sutlicient' strength tointernal 'pressure of rodents. ALD W ELL.

